211222111110 has 16 divisors (see below), whose sum is σ = 506933066736. Its totient is φ = 56325896288.

The previous prime is 211222111033. The next prime is 211222111151. The reversal of 211222111110 is 11111222112.

It is a happy number.

It is a super-2 number, since 2×211222111110² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211222111110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3520368489 + ... + 3520368548.

It is an arithmetic number, because the mean of its divisors is an integer number (31683316671).

Almost surely, 2^211222111110 is an apocalyptic number.

211222111110 is an abundant number, since it is smaller than the sum of its proper divisors (295710955626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211222111110 is a wasteful number, since it uses less digits than its factorization.

211222111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040737047.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211222111110 its reverse (11111222112), we get a palindrome (222333333222).

The spelling of 211222111110 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred eleven thousand, one hundred ten".